'''已知某煤场有29.5t煤,先用一辆载重4t的汽车运三次,剩下的用一辆载重2.5t的汽车运送,请计算还需要运送几次才能送完'''
total = 29.5
num1 = 3
rest = 29.5 - 4*num1
num2 = rest / 2.5
total_num = num1 + num2
print(total_num)